Improvement in self-acting door-bolts



E. FEIGE.

I SELF-ACTING noon-301.12 No.172,106. I Patented Jan.11,1876.

' for use with double doors.

UNITED STATES PATENT OFFIon.

ERNEST FEIGE, OF EAST SAGINAW, MICHIGAN.

IMPROVEMENT IN SELF-ACTING DOOR-BOLTS.

Specification forming part of Letters Patent No. 172,106, dated January 11,1876; application filed I November 15, 1875.

To all whom it may concern:

Be it known that I, ERNEST FEIGE, of East Saginaw, in the county of Saginaw and State of Michigan, have invented a new and useful lmprovementin Self-Acting Door-Bolts, which improvement is fully set forth in thefollowing specification, reference being had toithe accompanying drawings.

My invention relates to that class of bolts known as self-acting bolts, and designed It has for its object to provide a bolt which shall be rendered operative by the act of closing the second or lapping door; and, with this object in view, my invention consists of a plate adapted to be secured to'the frame of the door at the top, or to the sill, or both, said plate formed on the under side with a bearing, in which is hung a rocking shaft, provided with lugs or projections a suitable distance apart, and at about right angles to each other, so that the rocking of the shaft will alternately elevate and depress the lugs, suitable slots being formed in the opposite edges of the plate, to permit of said movement, as will be hereinaf ter more fully set forth.

In the accompanying drawing, Figure 1 is a plan View, showing a frame provided with a pair of double doors, the frame and sill being furnished with my'improved bolt. The sill is shown partly in section, exposing to view one of said bolts. Fig. 2 is a vertical section at the line as w of Fig. 1. Fig. 3 is a longitudinal vertical section of the'plate and bolts; Fig. 4, a top View thereof; Fig. 5, an end view, and Fig. 6 a perspective view.

Similar letters indicate like parts in the several figures.

A represents an ordinary door-frame, and B the sillthereof; G and G, the two doors, hinged to the frame, the latter, 0, adapted to close against and overlap the former. D represents the plate of the bolt, provided with screw-holes a a, and adapted to be let into, and secured to, the frame orsill, as clearly shown at Fig. 1. This plate D, for a suitable distance at its center, extends downwardly, to form a bear-' ing, 12, adapted to receive the rock-shaft c, on

which are secured two lugs or projections, d 0, arranged at about right angles to each other, so that when one lies in the same plane with the face of the plate D, the other will be raised up into the vertical position seen at Figs. 1,

position. The edge or face of the lug e, which is presented for contact with door 0., is slightly inclined, to facilitate the depression of said lug by the closing of the door G.

The operation of my improved bolt is as follows: The rock-shaft being turned so that the lugs 01 0 will occupy the position shown, the first door, 0, is closed, so that the sockets It will be directly in line with the lugs d. The second door, G, is now closed, and, coming in contact with the beveled or inclined face of the lug e, forces the same down as it passes over it, and causes the shaft 0 to rock in its bearings, thus forcing the lug at out through the plate D and into the sockets h, thus se curely holding or bolting the door G as long as the door 0 is in a closed state, (where it is held by an ordinary lock,) and as soon as the door 0 is opened, or swung from over the lug .6, the door 0 may be opened, which, operating on the inclined face of the lug d, forces it down and elevates the lug e to the original position, and ready for use when the doors are again closed.

What I claim as new, and desire to secure by Letters Patent, is-

A bolt consisting of a securing-plate, D, constructed as described, and having secured therein a rock-shaft, b, provided with lugs d e at about right angles to each other, adapted to be operated substantially in the manner and for the purpose specified.

East Saginaw, November 1, 1875.

ERNEST FEIGE.

Witnesses:

HENRY FEIGE, J. E. HATHAWAY. 

